Johnny,
>
> A simple option to turn this ON or OFF is needed. I don't really care
> about sorting. Make your life easier and just do an ON and OFF toggle.
>
> But please let me toggle the abbreviations off! I'm sure I'm not alone
> on this! (I'm really trying to like N6!)
You can turn it off, but you'll have to edit your prefs.js by hand.
Here's how I turned it off for my news.mozilla.org account:
exit the application
edit prefs.js, I found the line
user_pref("mail.server.server4.hostname", "news.mozilla.org");
so I knew which server (in this case, server4) to use.
Then I added the line
user_pref("mail.server.server4.abbreviate", false);
start the application.
No more abbreviation.
-Seth